EP 4212504 A1 20230719 - METHOD FOR PRODUCING COMPOUND
Title (en)
METHOD FOR PRODUCING COMPOUND
Title (de)
VERFAHREN ZUR HERSTELLUNG EINER VERBINDUNG
Title (fr)
PROCÉDÉ DE PRODUCTION D'UN COMPOSÉ
Publication
Application
Priority
- JP 2020153287 A 20200911
- JP 2021033037 W 20210908
Abstract (en)
The present invention provides a method capable of sufficiently reducing impurities with excellent separation efficiency even from a crystal-containing slurry that contains a low-purity mother liquor and has poor solid-liquid separation properties. The present invention relates to a method for producing a compound, the method including: a step of feeding a slurry containing crystals of the compound to a hydraulic wash column; a step of melting crystals in a crystal-containing circulation slurry discharged from the hydraulic wash column; and a step of returning a portion of a circulation liquid containing a melt obtained in the melting step to the hydraulic wash column, wherein the circulation liquid returned in the returning step in an amount of more than 30% by mass relative to 100% by mass of the melt serves as a washing liquid for crystals.
IPC 8 full level
C07C 51/25 (2006.01); C07C 57/05 (2006.01)
CPC (source: EP KR US)
B01D 9/0045 (2013.01 - US); B01D 9/0059 (2013.01 - US); C07C 51/252 (2013.01 - EP KR); C07C 51/42 (2013.01 - KR); C07C 51/43 (2013.01 - EP KR US); C07C 57/04 (2013.01 - KR); B01D 2009/0086 (2013.01 - US)
C-Set (source: EP)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
EP 4212504 A1 20230719; BR 112023004298 A2 20230404; CN 116057034 A 20230502; JP WO2022054841 A1 20220317; KR 20230051586 A 20230418; TW 202219026 A 20220516; US 2024025835 A1 20240125; WO 2022054841 A1 20220317
DOCDB simple family (application)
EP 21866800 A 20210908; BR 112023004298 A 20210908; CN 202180061621 A 20210908; JP 2021033037 W 20210908; JP 2022547629 A 20210908; KR 20237009489 A 20210908; TW 110133799 A 20210910; US 202118025576 A 20210908